ADSP-2109 AD [Analog Devices], ADSP-2109 Datasheet - Page 24

• Manufacturer Part Number: ADSP-2109
• Description: Low Cost DSP Microcomputers
• Manufacturer: AD [Analog Devices]

ADSP-2104/ADSP-2109
TIMING PARAMETERS (ADSP-2104/ADSP-2109)
MEMORY READ
Parameter
Timing Requirement:
t
t
t
Switching Characteristic:
t
t
t
t
t
Parameter
Timing Requirement:
t
t
t
Switching Characteristic:
t
t
t
t
t
NOTE
w = wait states
RDD
RDH
CRD
ASR
RDA
RWR
RDD
RDH
CRD
ASR
RDA
RWR
AA
RP
AA
RP
RD Low to Data Valid
A0–A13, PMS, DMS, BMS to Data Valid
Data Hold from RD High
RD Pulse Width
CLKOUT High to RD Low
A0–A13, PMS, DMS, BMS Setup before
RD Low
A0–A13, PMS, DMS, BMS Hold after RD
Deasserted
RD High to RD or WR Low
RD Low to Data Valid
A0–A13, PMS, DMS, BMS to Data Valid
Data Hold from RD High
RD Pulse Width
CLKOUT High to RD Low
A0–A13, PMS, DMS, BMS Setup before
RD Low
A0–A13, PMS, DMS, BMS Hold after RD
Deasserted
RD High to RD or WR Low
t
CK.
DMS, PMS
CLKOUT
A0 – A13
BMS
RD
WR
D
Figure 22. Memory Read
t
CRD
t
ASR
Min
0
0.5t
0.25t
0.25t
0.25t
0.5t
–24–
t
AA
CK
CK
Frequency Dependency
CK
CK
CK
t
– 8 + w
– 5
(CLKIN 20 MHz)
RDD
– 5
– 10
– 9
t
Min
0
17
7.5
2.5
3.5
20
RP
t
20 MHz
RDA
t
RDH
t
RWR
Max
0.5t
0.75t
0.25t
CK
CK
CK
– 13 + w
Max
12
19.5
22.5
– 18 + w
+ 10
REV. 0
Unit
ns
ns
ns
ns
ns
ns
ns
Unit
ns
ns
ns
ns
ns
ns
ns